• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Device with a rotatable shaft (1) and a stationary housing (2), wherein the shaft (1) is mounted in the housing (2) by means of at least one shaft bearing (3), wherein a seal (10, 11 , 12) and the shaft bearing (3) is lubricated with a lubricant, preferably oil, wherein on the shaft (1) on the side facing away from the shaft bearing (3) side of the seal (10, 11, 12) a fan (4 ) is attached, by the rotation of the shaft (1) in the region (5) between the fan (4) and shaft bearing (3), an overpressure can be generated. In addition to the blades (8), a recess (9) for receiving a tension band (7) is provided on the fan (4) through which the fan (4) is connected to the shaft (1).
    公开号:AT517196A1
    申请号:T50340/2015
    申请日:2015-04-27
    公开日:2016-11-15
    发明作者:Espada Jesus Contreras；Ricardo-Naoki Okai；Sven Schofer；Ueli Neff
    申请人:Andritz Hydro Gmbh；
    IPC主号:
    专利说明:

    Device and procedure for reducing lubricant losses at bearings
    The subject of this invention forms a device with a rotatable shaft, which is mounted in a fixed housing by means of at least one shaft bearing, wherein the shaft bearing with a lubricant, preferably oil, is lubricated.
    With shaft bearings, there is often the problem that lubricant escapes from the bearing and leads to contamination of the shaft environment. Such leaks are caused by the oppression generated by the rotating elements near the bearing or by capillarity. This problem often occurs in power generation plants.
    Power plants with turbines, generators and couplings are usually equipped with shaft bearings, which have a non-contact seal, often labyrinth seals. This type of seal has very low friction losses, causes virtually no wear and is also suitable for high speeds. The disadvantage of non-contact seals is that they do not guarantee a 100% seal. The lubricating oil supply for the shaft bearings is usually done centrally via a lubricating oil tank. The lubricating oil is pumped to the bearings by means of a lubricating oil pump.
    In order to prevent leakage of lubricating oil at the bearings, it is possible to vent the bearings. The vent lines from the bearings are introduced together into the central lubricating oil tank. A blower sucks air from the lubricating oil tank, creating a vacuum in the shaft bearing space. Such systems are often quite expensive.
    In some cases, the leakage of lubricating oil from bearings is prevented by so-called blocking air systems or blocking air rings. In these systems, compressed air is routed via lines to the area in front of the respective bearing. At the bearing ends so a compressed air cushion is built so that no oil can escape. Part of the compressed air enters the shaft storage room and the vent line into the oil tank, creating a slight overpressure in the tank, which must be removed via a vent opening. Active ventilation with a blower is usually not required in conjunction with barrier air systems.
    Barrier air systems are complex and require a certain amount of space, which retrofit existing systems with a barrier air system is often difficult.
    The invention is therefore based on the object to provide a shaft bearing that prevents oil leakage at shaft bearings or at least minimized and has a very simple structure. In addition, the present invention should also allow retrofitting of existing equipment.
    This problem is solved by a mounted on the shaft next to the shaft bearing fan, which rotates with the shaft, thereby promoting air to the shaft bearing and thus generates an overpressure in the area between the fan and shaft bearings. This air flow or this overpressure prevents the lubricant, usually oil, before, the camp at this
    Place to leave. Air that is being pressed into the warehouse can leave the warehouse at another location and, if necessary, be trapped by a filter of entrained oil particles.
    It is advantageous if in each case a fan is arranged on the shaft on both sides of the bearing.
    The fan according to the invention has a small footprint and can be easily attached to the shaft, for example by means of a tension band.
    For example, the fan may have a plurality of individual blades, as commonly used in fans.
    It is favorable if the overpressure area between fan and shaft bearing is limited by a ring, thereby allowing higher pressures to be generated in the overpressure area. It is also advantageous if a part of the fan is covered by this ring.
    The ring is either connected to the housing and thus fixed, or it is connected to the outer parts of the fan and rotates with this with.
    However, the subject of this invention also forms a method for reducing lubricant leakage at shaft bearings in rotating shafts. In this case, a fan is mounted on the shaft next to the shaft bearing so that upon rotation of the shaft by the fan, an overpressure is generated in front of the shaft bearing, thereby reducing the lubricant leakage from the shaft bearing is reduced or prevented.
    It can also be mounted on both sides of the shaft bearing a fan, so that on both sides of the bearing an overpressure is generated.
    Such a solution is well suited for existing systems with oil leaks, where no barrier air ring can be installed due to lack of space.
    The fan is advantageously produced by means of a 3D printing method, for example with a laser sintering method.
    In the following the invention will be described with reference to drawings. Show it:
    1 shows a schematic longitudinal section through the device according to the invention;
    Fig. 2 is an upper view of the fan;
    3 shows a longitudinal section through the fan according to the line A-A in Fig. 2.
    Fig. 4 is a perspective view of the fan;
    Like reference numerals in the figures indicate like components.
    FIG. 1 shows a longitudinal section through the device according to the invention. The rotatable shaft 1 is mounted here in a fixed housing 2 via a shaft bearing 3. The shaft bearing 3 is filled with oil here. At the shaft bearing 3, three seals 10, 11, 12 are arranged, which is a lubricant outlet to the right from the
    To reduce bearing internal. On the shaft 1, a fan 4 is attached with blades 8 via a clamping band 7. When the shaft 1 rotates, air is blown into the region 5 between the fan and the shaft layer 3 by the co-rotating fan 4 and thus generates an overpressure in this region 5. By this overpressure, oil leakage from the bearing 3 can be prevented or at least reduced. The fan 4 or the individual blades 8 are partially covered by a ring 6. As a result, the area 5 is delimited from the environment and a larger pressure build-up in front of the camp 3 allows.
    In Figures 2, 3 and 4, the fan 4 is shown from different views, it can be clearly seen the individual blades 8, is blown through the air in the area 5. In addition to the blades 8, a recess 9 for receiving a tension band 7 is provided on the fan 4.
    Existing devices can also be easily retrofitted with such a fan 4. For this purpose, the fan 4 may consist of several parts, for example, two semicircular components which are placed and fixed around the shaft 1, for example with a clamping band. 7
    The embodiment shown in the drawings represents only a preferred embodiment of the invention. The invention also includes other embodiments in which, for example, the shaft bearing is designed as a rolling bearing.
    权利要求:
    Claims (10)
    [1]
    claims
    1. Device having a rotatable shaft (1) and a stationary housing (2), wherein the shaft (1) is mounted by means of at least one shaft bearing (3) in the housing (2) and wherein the shaft bearing (3) with a lubricant, preferably oil, is lubricated, characterized in that on the shaft (1) next to the shaft bearing (3) a fan (4) is fixed, by the upon rotation of the shaft (1) in the region (5) between the fan (4) and Shaft bearing (3) an overpressure can be generated.
    [2]
    2. Apparatus according to claim l, characterized in that it is at the shaft (1) to the shaft (1) of an electrodynamic machine, preferably a generator, is.
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the region (5) between the fan (4) and shaft bearing (3) by a ring (6) is limited.
    [4]
    4. Apparatus according to claim 3, characterized in that the ring (6) partially covers the fan (4).
    [5]
    5. Apparatus according to claim 3 or 4, characterized in that the ring (6) with the housing (2) connected to or is a part thereof.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the shaft bearing (3) is a sliding bearing.
    [7]
    7. Device according to one of claims 1 to 6, characterized in that the fan (4) via a clamping band (7) with the shaft (1) is connected.
    [8]
    8. A method for reducing lubricant leaks at shaft bearings (3) in rotating shafts (1), characterized in that on the shaft (1) next to the shaft bearing (3), a fan (4) is attached, so that during the rotation of Shaft (1) by the fan (4) an overpressure in front of the shaft bearing (3) is generated.
    [9]
    9. The method according to claim 8, characterized in that the fan (4) by means of a clamping band (7) on the shaft (1) is attached.
    [10]
    10. A method for producing a fan (4) according to any one of claims 1 to 9, characterized in that the fan (4) via a 3D printing process, in particular via a laser sintering process, is produced.
    类似技术:
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    同族专利:
    公开号 | 公开日
    CA2983631A1|2016-11-03|
    EP3289249A1|2018-03-07|
    WO2016173842A1|2016-11-03|
    EP3289249B1|2019-11-13|
    AT517196B1|2017-03-15|
    BR112017020983A2|2018-07-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1062737A|1908-08-03|1913-05-27|Horace A Leslie|Steam-turbine blades.|
    US1463018A|1921-01-15|1923-07-24|Gen Electric|Shaft bearing|
    US3969805A|1974-12-23|1976-07-20|The Trane Company|Method of constructing an axial flow fan|
    US4808012A|1987-03-23|1989-02-28|The Timken Company|Flap seal for anti-friction bearings|
    EP0683338A1|1994-05-17|1995-11-22|Siemens Aktiengesellschaft|Shaft sealing system|
    DE102007014657A1|2007-03-27|2008-10-09|Siemens Ag|Shaft sealing device|
    DE102012212013B4|2012-07-10|2016-05-12|Josef Moser|Rotor for generating energy from incompressible flowing fluids|
    KR102126866B1|2013-08-07|2020-06-25|한화파워시스템 주식회사|Impeller assembly of fluid rotary machine and manufacturing method thereof|
    CN104343473B|2014-09-02|2015-09-09|华中科技大学|A kind of shaft end seal device for organic working medium radial-inward-flow turbine|WO2018138404A1|2017-01-26|2018-08-02|Wärtsilä Finland Oy|A non-contact shaft seal arrangement and a sealing assembly in an internal|
    法律状态:
    2020-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20200427 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50340/2015A|AT517196B1|2015-04-27|2015-04-27|Device and procedure for reducing lubricant losses at bearings|ATA50340/2015A| AT517196B1|2015-04-27|2015-04-27|Device and procedure for reducing lubricant losses at bearings|
    CA2983631A| CA2983631A1|2015-04-27|2016-04-13|Device and method to reduce the loss of lubricant at bearings|
    PCT/EP2016/058111| WO2016173842A1|2015-04-27|2016-04-13|Device and method for reducing lubricant losses in bearings|
    BR112017020983-7A| BR112017020983A2|2015-04-27|2016-04-13|device and method for reducing lubricant loss in bearings|
    EP16717593.4A| EP3289249B1|2015-04-27|2016-04-13|Device and method for reducing lubricant losses in bearings|
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